Designing Disaster Recovery Clusters using Metroclusters and Continentalclusters, Reprinted October 2011 (5900-1881)

3 Building Disaster Recovery Serviceguard Solutions Using
Metrocluster with Continuous Access for P9000 and XP
The HP StorageWorks P9000 Disk Array family or HP StorageWorks XP Disk Array series allows
you to configure data replication solutions to provide disaster tolerance for Serviceguard clusters
over long distances. This chapter describes the Continuous Access P9000 and XP software and
the additional files that integrate the P9000 or XP Disk Arrays with Metrocluster. It then shows how
to configure both metropolitan and Continentalclusters solutions using Continuous Access P9000
or XP.
The topics discussed in this chapter are:
• Files for Integrating P9000 or XP Disk Arrays with Serviceguard Clusters
• Overview of Continuous Access P9000 and XP Concepts
• Creating the Cluster
• Preparing the Cluster for Data Replication
• Configuring Legacy Packages for Disaster Recovery
• Configuring Modular Packages
• Support for Easy Deployment Feature
• Adding a Node to a Metrocluster
• Completing and Running a Metrocluster Solution with Continuous Access P9000 or XP
• Completing and Running a Continentalclusters Solution with Continuous Access P9000 or XP
Metrocluster also defines a Site Aware Disaster Tolerant Architecture for complex workloads such
as Oracle RAC database, including Oracle 10gR2 RAC, Oracle 11gR1 RAC, Oracle 11gR2 RAC,
and SAP. This solution uses an additional software feature called the Site Controller Package to
provide disaster tolerance for workload databases. For more information on the site aware disaster
tolerant architecture, see “Overview of Site Aware Disaster Tolerant Architecture” (page 337).
Files for Integrating P9000 or XP Disk Arrays with Serviceguard Clusters
Metrocluster is a set of executable programs and an environmental file that work in a Serviceguard
cluster to automate failover to alternate nodes in the case of disaster in metropolitan cluster. The
Metrocluster with Continuous Access for P9000 and XP product contains the following files.
Table 16 Metrocluster with Continuous Access for P9000 and XP
DescriptionName
The Metrocluster with Continuous Access for P9000 and XP
environmental file. This file must be customized for the
/opt/cmcluster/toolkit/SGCA/xpca.env
specific P9000 or XP Disk Array Series, and HP host system
configuration. Copies of this file must be customized for
each separate Serviceguard package.
The executable module that checks for a specific environment
file in the package directory and should not be edited.
/usr/sbin/DRCheckDiskStatus
The program that checks the status of the P9000 or XP
Continuous Access device group that is used by the
package.
/usr/sbin/DRCheckXPCADevGrp
The program that monitors the status of the P9000 or XP
Continuous Access package device group, sends notification,
and performs pre-defined actions on the device group.
/usr/sbin/DRMonitorXPCADevGrp
Files for Integrating P9000 or XP Disk Arrays with Serviceguard Clusters 153